Wallabies flyhalf Quade Cooper will miss the rest of the Rugby Championship campaign because of a knee injury.

The player picked up the injury during Australia’s 23-19 win over Argentina last weekend. Doctors believe the 24-year-old will need to undergo surgery, which will rule him out of the Wallabies’ away fixtures against the Springboks (29 September) and Pumas (7 October).

Cooper struggled with the same injury earlier this year and missed most of Super Rugby this season. Berrick Barnes is expected to take over the Wallabies No 10 jersey.

Cooper joins scrumhalf Will Genia, lock James Horwill, flank David Pocock, utility back James O’Connor, No 8 Wycliff Palu, wing Drew Mitchell and centre Rob Horne on the sidelines.